The rigid-interface friction model is usually used in the nonlinear vibrationof the rectangular plate with dry friction support edges. The present study provides an extensionby using a hysteretic spring friction model...The rigid-interface friction model is usually used in the nonlinear vibrationof the rectangular plate with dry friction support edges. The present study provides an extensionby using a hysteretic spring friction model and taking account of the stick-slip motion of theplate. Results for a range of problem parameters have been obtained. The results show that thenonlinear frequency response behavior of the system can be quite different from the rigid-interfacefriction model. The effects of the stiffness at friction interfaces and the stick-slip motion on thenonlinear vibration of the plate are significant and hence cannot be neglected.展开更多
Series of triazine derivatives, 2,4-bi-alkoxy-6-(O,O’-dialkyldithiophosphate)-s-1,3,5-triazine, weresynthesized. Their tribological properties as lubricating oiladditives in vegetable oil were evaluated using a four-...Series of triazine derivatives, 2,4-bi-alkoxy-6-(O,O’-dialkyldithiophosphate)-s-1,3,5-triazine, weresynthesized. Their tribological properties as lubricating oiladditives in vegetable oil were evaluated using a four-balltester. The results show that these triazine derivatives possessextreme pressure capacity, and they can improve antiwearand friction-reducing performance of base stock. Theelements chemical states of the worn surface were estimatedthrough X-ray photoelectron spectroscopy (XPS) andscanning electron microscope (SEM). The results show that aprotective film containing sulphide, phosphate and someorganic nitrogen compounds was formed on the worn surfaceduring the lubrication process, and the film possessesextreme pressure and antiwear properties.展开更多
文摘The rigid-interface friction model is usually used in the nonlinear vibrationof the rectangular plate with dry friction support edges. The present study provides an extensionby using a hysteretic spring friction model and taking account of the stick-slip motion of theplate. Results for a range of problem parameters have been obtained. The results show that thenonlinear frequency response behavior of the system can be quite different from the rigid-interfacefriction model. The effects of the stiffness at friction interfaces and the stick-slip motion on thenonlinear vibration of the plate are significant and hence cannot be neglected.
基金the National Natural Science Foundation of China(Grant No.20272036)the Natural Science Foundation of Jiangxi Province(Grant No.0320052).
文摘Series of triazine derivatives, 2,4-bi-alkoxy-6-(O,O’-dialkyldithiophosphate)-s-1,3,5-triazine, weresynthesized. Their tribological properties as lubricating oiladditives in vegetable oil were evaluated using a four-balltester. The results show that these triazine derivatives possessextreme pressure capacity, and they can improve antiwearand friction-reducing performance of base stock. Theelements chemical states of the worn surface were estimatedthrough X-ray photoelectron spectroscopy (XPS) andscanning electron microscope (SEM). The results show that aprotective film containing sulphide, phosphate and someorganic nitrogen compounds was formed on the worn surfaceduring the lubrication process, and the film possessesextreme pressure and antiwear properties.
